.backGroud {
    width: calc(100vw);
    background-image: url("/assets/cheng-4.png");
    -moz-background-size: 100% 100%;
    background-size: 100% 100%;
    height: 335px;
    /*position: relative;*/
    /*bottom: 130px;*/
    /*display: block;*/
}

.container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 160px - 335px);
}